What is it that shapes an inchoate mass of frustrated alienated individuals into a coherent movement, focusing their implacable hatred on a defined enemy to the point where they will give their lives for the movement's cause? The answer is, I submit, leadership—a concept not pursued in this otherwise excellent volume. The author addresses the mass violence of September 11 perpetrated by al Qaeda without mentioning Osama bin Laden, other than in passing. But bin Laden can be seen as a "sense-making" destructive charismatic leader who took the unfocused humiliation, shame, and frustration of his followers; provided an external explanation and cause, namely the United States; and focused these feelings into a consuming hatred (1). In so doing, he established a movement in which al Qaeda recruits subordinate their individual identity into the collective identity of dedicated members of a radical movement. If bin Laden decrees that giving their lives advances that cause, they will gladly do so. One can no more address al Qaeda and its excesses of hatred without considering the focusing role of bin Laden than one can analyze the extremity of the Holocaust without considering the demonic focus of Adolph Hitler. Bin Laden, like Hitler, in the words of Eric Hoffer (2), "manipulated the slime of discontented selves."